docs: reflect Phase 17 Wave 2 (docked overlay + Add-to-Queue) and Phase 16.5 capstone landing

PLAN.md

@@ -253,8 +253,10 @@ The phase deferred behind the home-hero **Plays** stat card (`NowPlayingStats.ra
 - **16.1 — Foundation: capture seam + transport + event log (nothing reads it yet).** Player-service play tracker (high-water mark + engagement floor), share tracker in `SharePopover` (debounced), `sendBeacon` interop + unload handler, `POST api/event/{play,share}` (proxied, rate-limited), append-only `play_event`/`share_event` log + incremental `play_counter` rollup, server-side release resolution + derived release totals. **No `anonId` yet; no card consumption.** Cold-start wave. **Landed:** 2026-06-19 on dev. Migration `20260619155610_AddPlayShareTelemetry` authored but not applied (Daniel-gated).
 - **16.2 — Completion-bucket classification + shares.** Three-bucket classification (D1) correct and exhaustive end to end (tracker → payload → log → per-bucket counter columns); share-channel split (link/embed). **Depends on 16.1.** **Landed:** absorbed into 16.1 — all §4.1 deliverables shipped inside the wave 16.1 foundation: `PlayBucket` enum (`Partial`/`Sampled`/`Complete`, exhaustive/non-overlapping) wired tracker → payload → log → per-bucket counter columns (`PlayCounter.PartialCount`/`SampledCount`/`CompleteCount`, `TotalPlays` computed sum); `ShareChannel` enum (`Link`/`Embed`) on `ShareEvent.Channel`; API-boundary bucket validation. The only §4.2 item not built is the optional `share_count` rollup on `play_counter` — correctly deferred (shares are not on the home-card hot path; per-target reads are speculative wave 16.4).
 - **16.3 — Unique-listener `anonId` layer (lowest-priority metric, D5).** Option A: mint/read client first-party `localStorage` id, thread `anonId` onto payloads (nullable in the log), count distinct server-side (all-time, D3). **The last metric layer** — folded into "everything finished," explicitly last-built of the substrate. **Depends on 16.1; builds on 16.2.** **Landed:** 2026-06-19 on dev (merge 297805b). No migration — `anon_id varchar(64)` columns and `IX_play_event_anon_id`/`IX_share_event_anon_id` indexes already shipped in the 16.1 migration.
-- **16.4 — Per-target / CMS stats surfaces.** `[speculative]` — `GET api/stats/{track,release}/{key}` + CMS analytics views (bucket/channel splits, leaderboards). Not committed; the event log already supports it. Off the critical path to the card; build before the capstone only if a surface wants it. **Depends on 16.1–16.3.**
-- **16.5 — Home Plays-card payoff (CAPSTONE, built LAST).** Extend `HomeStatsDto` + `GetHomeStatsAsync` with `TotalPlays` (+ secondary line = unique listeners, D7); flip `NowPlayingStats`'s third card from placeholder to live through the existing `GET api/stats/home` round-trip. **The final wave — built only once 16.1–16.3 are in place.**
+- **16.4 — Per-target / CMS stats surfaces.** `[speculative — not built; passed over]` — `GET api/stats/{track,release}/{key}` + CMS analytics views (bucket/channel splits, leaderboards). Not committed; the event log already supports it. **Skipped as speculative per Daniel (2026-06-19); available to build later if a surface wants it.** Off the critical path to the card. **Depends on 16.1–16.3.**
+- **16.5 — Home Plays-card payoff (CAPSTONE, built LAST).** Extend `HomeStatsDto` + `GetHomeStatsAsync` with `TotalPlays` (+ secondary line = unique listeners, D7); flip `NowPlayingStats`'s third card from placeholder to live through the existing `GET api/stats/home` round-trip. **The final wave — built only once 16.1–16.3 are in place.** **Landed:** 2026-06-19 on dev.
+
+**Phase 16 is complete.** Waves 16.1, 16.2 (absorbed into 16.1), 16.3, and 16.5 all landed on dev (2026-06-19). Wave 16.4 was speculative and deliberately skipped. Privacy footer line (`DeepDrftFooter.razor` `.deepdrft-footer-privacy` disclosure) also landed. The anonymous play/share substrate, unique-listener metric, and live Plays card are in place.
 
 **Product decisions D1–D7 — RESOLVED (Daniel 2026-06-19, spec §10).** D1 (three-bucket sampled), D2 (engagement floor on, ≥3s/≥5%), D4 (release plays derived server-side), D5 (Option A — client-minted first-party `localStorage` id, metric labelled "listeners," fingerprinting rejected) resolved on explicit pick. D3 (all-time window), D6 (incremental-on-write rollup), D7 (card secondary = unique listeners) resolved-by-default — low-risk to revisit during their wave. Road-not-taken preserved in the spec.
 
@@ -298,10 +300,12 @@ transitions touch interop.
 
 **Sequenced as three waves.** `17.1 → {17.2, 17.3}`. **17.1 (engine `Move`/`RemoveAt` + the shared
 `QueueList` view) is the cold-start prerequisite**, settled and independent of the UI decisions —
-it can begin immediately. 17.2 (docked overlay, editable, `MudDropContainer` reorder) and 17.3 (Fixed
-embed panel + snippet resize + Add-to-Queue — **the OQ1 Option-A-vs-B feasibility call is made here**)
-hang off it and are largely parallel. Add-to-Queue may split to a standalone 17.4 (it needs only the
-existing `Enqueue`/`EnqueueRange`, not 17.1's new members). **Landed:** 2026-06-19 on dev.
+it can begin immediately. **Landed:** 2026-06-19 on dev. 17.2 (docked overlay, editable,
+`MudDropContainer` reorder) and 17.3 (Fixed embed panel + snippet resize — **the OQ1
+Option-A-vs-B feasibility call is made here**) hang off it and are largely parallel. Add-to-Queue
+split to a standalone 17.4 (needs only the existing `Enqueue`/`EnqueueRange`, not 17.1's new
+members). **Landed (17.2):** 2026-06-19 on dev. **Landed (17.4):** 2026-06-19 on dev. 17.3 remains
+pending.
 
 Full design — goal, constraints, use cases, acceptance criteria, test cases, wave decomposition, and
 the open-question set: `product-notes/phase-17-player-queue-view.md`.